[Misc][LoRA] Clean up the function interface of Punica

[jeejeelee]

Description

The current Punica interfaces(functions whose names start with add_ in punica.py) are somewhat complex and disorganized. This PR primarily categorizes all LoRA layers into the following three types and clean up related interfaces. The benefits include simplifying and standardizing functions to facilitate LoRA support across other platforms, such as: #4830 #10565

1. Linear

Three functions are provided, where add_lora_linear is for all linear lora in layers.py, while add_shrink and add_expand are designed for full sharded lora in fully_sharded_layers.py

2. Embedding

Only one function is needed, see: add_lora_embedding

3. Logits

Only one function is needed,see:add_lora_logits

cc @SanjuCSudhakaran
ping @DarkLight1337
@Isotr0py Since you're the author of #4830, would you please take a look at this PR as well?

[github-actions]

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[Isotr0py]

Thanks for cleaning up the duplicate function! I added some initial comments about the punica interface. PTAL!

[Isotr0py]

Overall LGTM!